<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let num = +prompt('请输入秒数')
        function fn( t ) {
            if (t<=0){
                alert('输入大于0的数')
                return
            }
            let h = parseInt(t / 60 / 60 % 24)
            let m = parseInt(t / 60 % 60)
            let s = parseInt(t % 60)

            h = h < 10 ? '0' + h : h
            m = m < 10 ? '0' + m : m
            s = s < 10 ? '0' + s : s
            return `${h}时${m}分${s}秒`
        }
        document.write (fn (  num ))





    </script>
</body>

</html>